Question: What noble title did Louis the Pious have in year 814?
Paraphrase: Louis the Pious possessed what noble title in 814?
SPARQL (Wikidata): SELECT ?obj WHERE { wd:Q43974 p:P97 ?s . ?s ps:P97 ?obj . ?s pq:P582 ?x filter(contains(?x , '814-0-0')) }